A CASE OF GIANT MUCINOUS CYST ADENOMA IN THE SACROCOCCYGEAL REGION

Abstract

We present a case of giant mucinous cyst adenoma which occurred in the sacrococcygeal region and developed evacuational disturbance. A 41-year-old woman, who underwent sacral tumor resection on her birth, noticed a slowly growing mass in the perianal region and developed evacuational disturbance. She was referred to our hospital for the evaluation of tumor. Image studies suggested a recurred sacrococcygeal teratoma.The well-defined tumor was 1070 gm in weight and contained large amount of mucinous fluid. Histologically, it was mucinous cyst adenoma without any malignancy. There is no previous report of mucinous cyst adenoma occurred in the sacrococcygeal region, although it is common in the ovary and a few in the retroperitoneum. Histogenesis of sacrococcygeal cyst adenoma is unclear. We applied a technique of posterior gluteal thigh faciocutaneus flap because of a large amount of tissue and skin defect. This was proved to be useful from cosmetic and functional standpoint to cover the tissue defect as well as to reinforce the vulnerability of the pelvic floor after the resection of the tumor and some part of the levator ani muscle.